Improvement in wash-basins



G. W. DEAN. Wash-Basin.

No. 215.891. Patented May 271, 1879;

Fig. 1,

IN VENTOR WITNESSES ATTORNEYS.

HER. WASHINGTON D C GEORGE W. DEAN,

PATENT OFFICE OF NE'W YORK, N. Y.

IMPROVEMENT IN WASH-BASINS.

Specification forming part of Letters Patent No 215,891, dated May 27, 1879; application filed March 3, 1879.

Similar letters of reference indicate corre I sponding parts.

The subject of this invention is a means for preventing the influx of sewer-gas into the rooms of dwellings through the overflowpipes of set wash bowls and basins without materially retarding the escape of water through the overflow-pipe; and the invention consists of a short tube provided at one end with a hinged valve resting upon an oblique seat, and at the other end with a flange, which, when the tube is inserted into the overflow-opening in the bowl, is made to conform to and serve as the means of fastening the valve to the bowl, all

as will be hereinafter explained.

A represents an ordinary wash or hand basin, which is provided wit-h a dischargeopening, a, in its bottom, and an overflow or waste opening, at in the upper part of one side, in the usual way, except that the said overflow-opening, instead of being a number of small holes, is a single large one.

In the overflow-opening a is secured a short tube, B, having a flange around its outer end, to rest against or be let into the inner surface of the basin A.

The outer end of the tube B is beveled or inclined, and to its upper side is hinged a valve, 0, which is thus held down upon its seat by its own weight,

raises the valve 0 and flows ofl' through the waste-pipe. As soon as the outflow 0f the water ceases, the valve 0 closes automatically, and remains closed until again opened by the pressure of the water. WVith this construction an pressure of gas from the sewer will only hold the valve 0 more closely to its seat, so that any-escape of the said gas into the room will be wholly prevented.

The inner end of the tube Bis provided with cross-bars b, to serve as a screen to prevent any coarse substance that would be liable to choke 01' clog the waste-pipe from entering it.

I am aware that it is not a new idea to use a valve in connection with the overflow-pipe of a set water-basin, and I therefore do not wish to be understood as making a broad claim to such invention; but,

Having described my invention,w hat I claim as new 1s The combination, with the overflow-pipe of a set wash bowl or basin, of the tube B, adapted to tit the overflow-opening in the bowl, and provided at. one end with a flange, and at the other end with a hinged valve, (1, the latter seating upon the oblique end of the tube, whereby, except when subjected to the action of the overflow-water, it is kept closed by its gravity alone, while the former serves as a means of attaching the device to the bowl or basin, as and for the purpose specified.

GEORGE W. DEAN.

Witnesses: 7

JAMES T. GRAHAM, G. SEDGWICK.

With this construction, when the water rises in the basin A to the overflow-opening a it 

